Definition of grey mould in English:

grey mould

(US gray mold)

noun

  • Any of several fungi of a greyish colour which grow on plants and fruit; especially Botrytis cinerea, which affects numerous plants, and often forms a fluffy growth on strawberries and other soft fruit.

Origin

Late 18th century; earliest use found in John Lightfoot (1735–1788), Church of England clergyman and naturalist.